42405688 has 16 divisors (see below), whose sum is σ = 85627080. Its totient is φ = 19571808.

The previous prime is 42405677. The next prime is 42405691. The reversal of 42405688 is 88650424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203770 + ... + 203977.

Almost surely, 2^42405688 is an apocalyptic number.

It is an amenable number.

42405688 is an abundant number, since it is smaller than the sum of its proper divisors (43221392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42405688 is a wasteful number, since it uses less digits than its factorization.

42405688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407766 (or 407762 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 42405688 is about 6511.9649876209. The cubic root of 42405688 is about 348.7182724870.

The spelling of 42405688 in words is "forty-two million, four hundred five thousand, six hundred eighty-eight".